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Finding the Fourth Proportional to 260,112.40, 390,168.60 and 73,099.60

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Solution

The fourth proportional to 260,112.40, 390,168.60 and 73,099.60 is: 109,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,112.40 : 390,168.60 = 73,099.60 : x
  2. Step 2: Convert to fraction form
    260,112.40/390,168.60 = 73,099.60/x
  3. Step 3: Cross multiply
    260,112.40x = 390,168.60 × 73,099.60
  4. Step 4: Simplify right side
    260,112.40x = 28,521,168,592.56
  5. Step 5: Solve for x
    x = 28,521,168,592.56/260,112.40
  6. Step 6: Final answer
    x = 109,649.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.